From patchwork Tue Feb 24 12:53:59 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Rameshwar Prasad Sahu X-Patchwork-Id: 442956 Return-Path: X-Original-To: incoming-dt@patchwork.ozlabs.org Delivered-To: patchwork-incoming-dt@bilbo.ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 9216B140159 for ; Tue, 24 Feb 2015 23:55:36 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752679AbbBXMz1 (ORCPT ); Tue, 24 Feb 2015 07:55:27 -0500 Received: from denmail01-v4020.amcc.com ([192.195.68.30]:40379 "EHLO denmail01.apm.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1752671AbbBXMzZ (ORCPT ); Tue, 24 Feb 2015 07:55:25 -0500 Received: from apm.com (pnqlwv041.amcc.com [10.48.19.141]) by denmail01.apm.com (8.13.8/8.13.8) with ESMTP id t1OCscUh005411; Tue, 24 Feb 2015 05:54:39 -0700 Received: (from rsahu@localhost) by apm.com (8.13.8/8.13.8/Submit) id t1OCscAY031520; Tue, 24 Feb 2015 18:24:38 +0530 From: Rameshwar Prasad Sahu To: vinod.koul@intel.com, dan.j.williams@intel.com Cc: dmaengine@vger.kernel.org, arnd@arndb.de, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, ddutile@redhat.com, jcm@redhat.com, patches@apm.com, Rameshwar Prasad Sahu , Loc Ho Subject: [PATCH v6 3/3] Documentation: dma: Add APM X-Gene SoC DMA engine driver documentation Date: Tue, 24 Feb 2015 18:23:59 +0530 Message-Id: <1424782439-31485-4-git-send-email-rsahu@apm.com> X-Mailer: git-send-email 1.8.2.1 In-Reply-To: <1424782439-31485-1-git-send-email-rsahu@apm.com> References: <1424782439-31485-1-git-send-email-rsahu@apm.com> Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org This patch adds device tree binding for APM X-Gene SoC DMA engine driver. Signed-off-by: Rameshwar Prasad Sahu Signed-off-by: Loc Ho --- .../devicetree/bindings/dma/apm-xgene-dma.txt | 49 ++++++++++++++++++++++ 1 file changed, 49 insertions(+) create mode 100644 Documentation/devicetree/bindings/dma/apm-xgene-dma.txt -- 1.8.2.1 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html diff --git a/Documentation/devicetree/bindings/dma/apm-xgene-dma.txt b/Documentation/devicetree/bindings/dma/apm-xgene-dma.txt new file mode 100644 index 0000000..cfbdcdb --- /dev/null +++ b/Documentation/devicetree/bindings/dma/apm-xgene-dma.txt @@ -0,0 +1,49 @@ +Applied Micro X-Gene SoC DMA nodes + +DMA nodes are defined to describe on-chip DMA interfaces in +APM X-Gene SoC. + +Required properties for DMA interfaces: +- compatible: Should be "apm,xgene-dma". +- device_type: set to "dma". +- reg: Address and length of the register set for the device. + It contains the information of registers in the same order + as described by reg-names. +- reg-names: Should contain the register set names. + - "dma_csr": DMA control and status register address space. + - "ring_csr": Descriptor ring control and status register + address space. + - "ring_cmd_csr": Descriptor ring command register address space. +- interrupts: DMA has 5 interrupts sources. 1st interrupt is + DMA error reporting interrupt. 2nd, 3rd, 4th and 5th interrupts + are completion interrupts for each DMA channels. +- clocks: Reference to the clock entry. + +Optional properties: +- dma-coherent : Present if dma operations are coherent + +Example: + dmaclk: dmaclk@1f27c000 { + compatible = "apm,xgene-device-clock"; + #clock-cells = <1>; + clocks = <&socplldiv2 0>; + reg = <0x0 0x1f27c000 0x0 0x1000>; + reg-names = "csr-reg"; + clock-output-names = "dmaclk"; + }; + + dma: dma@1f270000 { + compatible = "apm,xgene-dma"; + device_type = "dma"; + reg = <0x0 0x1f270000 0x0 0x10000>, + <0x0 0x1f200000 0x0 0x10000>, + <0x0 0x1b008000 0x0 0x2000>; + reg-names = "dma_csr", "ring_csr", "ring_cmd_csr"; + interrupts = <0x0 0xb8 0x4>, + <0x0 0xb9 0x4>, + <0x0 0xba 0x4>, + <0x0 0xbb 0x4>, + <0x0 0x82 0x4>; + dma-coherent; + clocks = <&dmaclk 0>; + };